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What is the absolute value of the complex number -4-sqrt2i

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

If f(x)=x+7 and g(x)=1/x what is (fog)(x)