In the expansion of (2+3x)^n the coefficients of x^3 and x^4 are in the raio 8:15. Find n. ratios are in 8:15, therefore, BUT OMG the answer is 8!!!!!!!!!!!!!!!! WHY!! what's wrong with my working out.
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Hello, differentiate! In the expansion of , the coefficients of and are in the raio 8:15. . . . . . . These are wrong The two terms are: . . . . Then: . . . . . . . . . . . . .
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