Use Gauss's approach to find the following sum (do not use formulas):
4+9+14+19+...+59.
The sum of the sequence is
find the following sum
Use Gauss's approach to find the following sum (do not use formulas):
4+9+14+19+...+59.
The sum of the sequence is ?
4+9+14+19+24+29+34+39+44+49+54+59(reverse)59+54+49+44+39+34+29+24+19+14+9+4(sum)63+63+63+63+63+63+63+63+63+63+63+63
The sum of the sequence is 12∗632=378