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英語 高校生

この英文から、なぜ筆者のプランは毎月100ドル以上かかったと言えないのか教えてほしいです

B You are a college student going to study in the US and need travel insurance. You find this review of an insurance plan written by a female international student who studied in the US for six months. 0 There are many things to consider before traveling abroad: pack appropriate clothes, prepare your travel expenses, and don't forget medication (if necessary). Also, you should purchase travel insurance. Imam gavo 0012 1ovo od 1200 sla When I studied at Fairville University in California, I bought travel insurance from TravSafer International. I signed up online in less than 15 minutes and was immediately covered. They accept any form of payment, usually on a monthly basis. There were three plans. All plans include a one-time health check-up. gisinal The Premium Plan is $100/month. The plan provides 24-hour medical support through a smartphone app and telephone service. Immediate financial support will be authorized if you need to stay in a hospital. It had the 24-hour telephone The Standard Plan worked best for me. assistance and included a weekly email with tips for staying healthy in a foreign country. It wasn't cheap: $75/month. However, it was nice to get the optional 15% discount because I paid for six months of coverage in advance. If your budget is limited, you can choose the Economy Plan, which is $25/month. It has the 24-hour telephone support like the other plans but only covers emergency care. Also, they can arrange a taxi to a hospital at a reduced cost if considered necessary by the support center. I never got sick or hurt, so I thought it was a waste of money to get insurance. Then my friend from Brazil broke his leg while playing soccer and had to spend a few days in a hospital. He had chosen the Premium Plan and it covered everything! I realized how important insurance is-you know that you will be supported when you are in trouble.

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数学 高校生

(1)です、この場合、ルートの中に絶対値をつける時、|x|^2、|x+2|^4と|x^2|、|(x+2)^4|って同じことですよね?回答お願いします、、

基本 例題 68 対数微分法 tanx欠の関数を微分せよ。 (x+2)4 inx 3 1161) y= Vx2(x2+1) 0000 [(2) 岡山理科 (2) y=xx(x>0) 基本 ax+b/ 指針 (1)右辺を指数の形で表し,y=(x+2)x3(x2+1) F3として微分することもできる 計算が大変。 このような複雑な積・商・累乗の形の関数の微分では,まず, 両辺(の 対値)の自然対数をとってから微分するとよい。 →積は和,商は差は倍となり,微分の計算がらくになる。 (2)(x)'=nxn-1 や (ax)'=axl0ga を思い出して,y=xxxx または y'=x*logx とするのは誤り! (1) と同様に,まず両辺の自然対数をとる。 (x)}= CHART 累乗の積と商で表された関数の微分 両辺の対数をとって微分す とおく 辺正という保証がないからばりやり正にする l 1 (1) 両辺の絶対値の自然対数をとって x+2/ <lvl=3 +x |² (x²+1) Og2 02 "答 10g|v|= 1/2/3{410g|x+2|-21og|x|-log(x2+1)} 3 =2f 1 4 2 2x 両辺をxで微分して 3 x+2 x x2+1 とお ある よって として両辺の自然対数 る (対数の真数は正)。 なお,常に x 2 +1> 0 対数の性質 g20 y' = 3 4x(x2+1)-2(x+2)(x2+1)-2x2(x+2) (x+2)x(x2+1) 1-2(4x2-x+2). 3 = • • (x+2) 4 3(x+2)x(x2+1) Vx2(x2+1) 2 (4x²-x+2) x+2 •y. 10gaMN=10ga M+10g M loga =logaM-10ga N 10gaM=kloga M (a>0, a = 1, M>0, N

解決済み 回答数: 1