Question

निम्नांकित श्रेणियों का योगफल- ज्ञात कीजिए:
Find the sum of the following series :
1. 1+3+5+... to n terms.
2. 1.3 +3.5+5.7+... ton terms.
3. 12+4+72+10+... ton terms.
4. 12 + (10+2) + (10+2+3)+ ... to 10 terms.
Hint:
t, = 1+2+3+...' = EM​

Answer 1

Answer:

i didn't know

Step-by-step explanation:

because this chapter i cant study ok sorry