Question

1.The  term 215th of the expression A=1-7+13-19+25-31+⋯ is...

2.The number of values of n such that n²+34  which is a square number is...

3.Given a division If dividend and divisor are increased to 90 and 6 units respectively,then the quotient and the remainder are not changed the quotient is...

Giúp mình với

 

Answer 1

Nhớ giải cụ thể giùm mình nha! Cám ơn!

Answer 2

cau 2 la n=1 chu cau 1 voi 3 minh ko biet