plz answer

Plz answer Q no 5 and 7.

5 Answers

5th
2 , 4 , 6 .....100 ..............1>
so total 50
n
5 , 15 , 25 , ,,,,,,,95 ...........2>

total
add 1> and 2>
3125

but correct answer is 3050

then mayb calculation mistake
butmethodzsame

take all multiples of 2 sum is : 2+4+...100 = 51x50 = 2550

sum of multiples of 5 not a multiple of 2

= 5+15+....95

= 5(1+3+5.....19)
=5x100 = 500

total sum is 3050

f(x+y) = f(x)f(y)

f(2x) = f(x)²

also f(n)=f(1)ⁿ (Something that i am leaving for you to fill in)

hence the total sum is

f(1)+f(2).... (n) = 120

so 3+3²+3³+3⁴=120

thus n=4

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